<nav class="navbar">
  <button class="btn btn-default navbar-btn fa fa-bars"></button>
  <ul class="nav navbar-right">
    <li class="nav-item"><a class="nav-link" href="profile.html"><i class="fa fa-user"></i>个人中心</a></li>
    <li class="nav-item"><a class="nav-link" href="login.html"><i class="fa fa-sign-out"></i>退出</a></li>
  </ul>
</nav>